I am interested in reducing the compilation time in debug mode as much as possible. (To speed up development iteration.) What properties matter the most when choosing hardware? I guess the thread count does not matter much as the compiler utilizes only 1 thread in most stages of the compilation. …

It looks like the main parameter here is “Single Thread Rating” / “turbo speed frequency” (and it is necessary to take into account the CPU architecture). Current Ryzens 7/9 (Zen 4) reach over 4000 points on Single Thread Rating. https://www.cpubenchmark.net/cpu.php?cpu=AMD+Ryzen+7+7700&id=5169 A…

[image] notramo: I guess the thread count does not matter much as the compiler utilizes only 1 thread in most stages of the compilation. It could matter more in the future. See Compiler: parallel codegen with MT by ysbaddaden · Pull Request #14227 · crystal-lang/crystal · GitHub

You’ll want a fast single core for all the passes (semantic, …) but one (llvm codegen). On development, without --single-module (implied by --release), you’ll benefit from many cores during the pass (see --threads) unless you’re on windows because it depends on fork. We hit thread safety issues in…

Thanks a lot. (I would mark this answer as solution alongside with @pfischer ’s as both comments include useful info, but unfortunately this forum only allows to select one comment.)

Choosing CPU for fastest compilation

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Choosing CPU for fastest compilation

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